Cita APA (7th ed.)

Mill, R. C. (1985). The tourism system: An introductory text. Prentice-Hall.

Cita Chicago (17th ed.)

Mill, Robert Christie. The Tourism System: An Introductory Text. Englewood Cliffs, N.J: Prentice-Hall, 1985.

Cita MLA (9th ed.)

Mill, Robert Christie. The Tourism System: An Introductory Text. Prentice-Hall, 1985.